USGS2 and DS2 have the same coordinates. USGS1 and DS3 have the same coordinates.
Notes on gages: So far DS2 and DS3 have not been used. US1 and DS1 are mostly point measurements.
DS1 minus US1 (uppermost)
## [1] 0.03090149
USGS2 minus DS1
## [1] 0.04210856
USGS1 - USGS2
## [1] -0.0001941755